I flatly don't believe 17% of Millennials have bought digital coins. Where's this from?
I saw one headline that claimed a third of Millennials had bought cryptocurrencies. Tracing it back, it came from a survey a few months before that that claimed a third of Millennials would prefer cryptos to stocks. And that survey came from Pollfish ... and Pollfish surveys are self-selecting, i.e. statistically bogus.
The trouble with striking headlines about crypto is that they mostly turn out to be completely made up BS.